<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
        div {
            width: 300px;
            height: 200px;
            border: 1px solid #ccc;
            background: radial-gradient(circle,red 30%,#fff 30%);
        }
        p {
            width: 300px;
            height: 300px;
            border-radius: 0 210px 0 0;
            background: repeating-radial-gradient(  circle at bottom left,
            #ccc,#ccc 10%,#fff 10%,#fff 20%);
        }
    </style>
</head>
<body>
    <div></div>
    <p></p>
</body>
</html>